1. Department of Hematology, Hemostasis, Oncology, and Stem Cell Transplantation,
2. Integrated Research and Treatment Center, and
3. Institute of Biometry, Hannover Medical School, Hannover, Germany;
4. Department of Medicine II, Hubertus Wald University Cancer Center, Oncological Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany;
5. Department of Hematology-Oncology, University of Freiburg Medical Center, Freiburg, Germany;
6. Department of Internal Medicine II, University of Tübingen, Tübingen, Germany;
7. Department of Internal Medicine V, Klinikum Lüdenscheid, Germany; and
8. Department of Hematology, Erasmus University Medical Center, Rotterdam, The Netherlands